Underground diaphragm wall device suitable for complex geological conditions and construction method

Abstract

The invention relates to the technical field of building construction, in particular to an underground diaphragm wall device suitable for complex geological conditions and a construction method.The device comprises a steel reinforcement cage, guide boxes are symmetrically arranged on the two sides of the top and the two sides of the bottom of the steel reinforcement cage, and pulleys capable of adjusting the extending length are arranged on the outer sides of the guide boxes; an adjusting assembly composed of a worm gear, a worm, a threaded sleeve and an adjusting rod is arranged in the box to control the pulleys to stretch out and draw back. The bottom of the guide box is fixedly connected with a mounting box, a clamping jaw is rotationally connected in the guide box through a first rotating shaft, and a locking assembly comprising a [-shaped locking block, a spring and a push plate is arranged. During construction, the clamping jaw and the locking assembly are used for automatically clamping the reinforcement cage, and after the reinforcement cage is hoisted into the groove, the pulley is adjusted to be tightly attached to the groove wall so as to guide the reinforcement cage to be centered; when the reinforcement cage is lowered to the bottom of the groove, the locking assembly automatically relieves locking in stages, the clamping jaw retracts under the action of the torsional spring, and the device is separated from the reinforcement cage. The clamping device has the advantages that the groove wall is protected, automatic centering is achieved, clamping is stable, and automatic unhooking can be achieved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a diaphragm wall device and construction method suitable for complex geological conditions. Background Technology

[0002] Diaphragm wall systems are key components in deep foundation pit engineering and diaphragm wall construction, primarily used to form underground support or load-bearing structures under complex geological conditions. Their core component is a steel cage, which is hoisted into a pre-excavated trench, where concrete is poured to form a continuous wall. This device and construction method play a crucial role in ensuring trench wall stability, accurate wall positioning, and the final structural quality.

[0003] In existing technologies, before lowering the reinforcing cage, it is usually necessary to inject wall-protecting slurry into the excavated trench. The main function of this slurry is to form a dense and tough "mud skin" on the surface of the trench wall to balance the ground pressure and maintain the temporary stability of the trench wall. During construction, the reinforcing cage is directly lifted by a crane and placed into the trench filled with slurry.

[0004] However, the aforementioned existing devices and construction methods have significant shortcomings: Firstly, during the lowering process, the reinforcing cage is highly susceptible to scraping against the trench wall, damaging the mud skin that serves as crucial temporary support. Once the mud skin is damaged, the unprotected local soil becomes less stable under the hydrostatic pressure of the mud slurry, potentially leading to localized soil spalling, rockfalls, or even trench wall collapse. Furthermore, falling soil or rocks may become lodged between the reinforcing cage and the trench wall, preventing the cage from being lowered to the design elevation (i.e., "cage jamming"). In severe cases, the collapsed soil may partially bury the reinforcing cage, creating a difficult-to-manage engineering accident. Simultaneously, the irregular shape caused by scraping against the trench wall can affect the quality of subsequent concrete pouring, easily creating defects such as mud inclusions and voids within the wall, impairing the overall strength and waterproofing effect of the structure. This defect is particularly common in soft soil construction.

[0005] Secondly, the lack of an effective guiding and centering control mechanism during the lowering of the reinforcing cage in the trench makes it difficult to ensure that it is located at the center of the trench's cross-section. This may result in uneven protective layer thickness of the reinforcing cage after concrete pouring, with some reinforcing bars even exposed outside the concrete, seriously affecting the durability and structural safety of the diaphragm wall.

[0006] Therefore, it is necessary to provide a new diaphragm wall device suitable for complex geological conditions to solve the above-mentioned technical problems. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides a diaphragm wall device and construction method suitable for complex geological conditions.

[0008] The diaphragm wall device suitable for complex geological conditions provided by the present invention includes: a reinforcing cage, characterized in that guide boxes are respectively provided on both sides of the top and bottom of the reinforcing cage; among the four guide boxes, the tops of the two upper guide boxes are symmetrically and fixedly connected with lifting lugs; three pulleys are equidistantly arranged on the side of the guide box away from the reinforcing cage, and an adjustment component is installed inside the guide box to adjust the extension length of the pulleys so that the pulleys fit against the inner wall of the trench; an installation box is fixedly connected to the bottom of each guide box, and two clamping slots are equidistantly opened on the side of the installation box near the reinforcing cage, and a first rotating shaft is symmetrically rotatably connected inside each clamping slot, and a clamping claw is fixedly connected to the middle of the first rotating shaft for clamping the reinforcing cage; a locking component is installed inside the installation box for controlling the clamping and releasing of the clamping claw.

[0009] Preferably, the adjusting assembly includes: an adjusting rod; three adjusting slots are equidistantly provided on the side of the guide box away from the reinforcing cage, and the adjusting rod is disposed inside the adjusting slots; a spline groove is provided on the outer wall of the adjusting rod, and spline teeth are fixedly connected to the inner wall of the adjusting slots, with the spline teeth slidingly engaging with the spline grooves; the end of the adjusting rod away from the reinforcing cage is rotatably connected to a pulley; a second rotating shaft is rotatably connected inside the top of the guide box, and three worm gears are uniformly fixedly connected to the outer wall of the second rotating shaft along the axial direction; three worm wheels are fixedly fixedly connected equidistantly inside the guide box, with the worm wheels meshing with the worms; a threaded sleeve is fixedly connected to the inner wall of the worm wheels; the outer wall of the adjusting rod is threaded, and the adjusting rod is threadedly connected to the threaded sleeve.

[0010] Preferably, a third rotating shaft is rotatably connected to the top of the guide box, a driving cone wheel is fixedly connected to the bottom of the third rotating shaft, a driven cone wheel is fixedly connected to the outer wall of the second rotating shaft, and the driving cone wheel meshes with the driven cone wheel; the top of the third rotating shaft extends out of the guide box and is fixedly connected to a knob.

[0011] Preferably, the locking assembly includes: an inverted locking block, the inverted locking blocks being symmetrically arranged inside the mounting box, the inverted locking blocks being used to engage with the grippers to lock the grippers in their clamping state; an L-shaped connecting rod being fixedly connected to the middle of the side of the inverted locking block away from the grippers; T-shaped sliding grooves being symmetrically provided inside the mounting box; the inverted locking blocks and the L-shaped connecting rods sliding within the T-shaped sliding grooves; and a push plate being fixedly connected to the bottom of the L-shaped connecting rod.

[0012] Preferably, the top of the push plate is fixedly connected to three guide rods, the top of the guide rods is slidably connected to the mounting box, the top of the guide rods is fixedly connected to a spring, and the top of the spring is fixedly connected to the inner wall of the mounting box. The spring is a compression spring, and the spring force is greater than the weight of the push plate and less than the sum of the weights of the guide box and the mounting box.

[0013] Preferably, among the four push plates, the bottom of the two upper push plates are symmetrically fixedly connected to connecting plates, and the bottom end of the connecting plates is fixedly connected to the guide box located below.

[0014] Preferably, a torsion spring is provided on the outer wall of the bottom end of the first rotating shaft. One end of the torsion spring is fixedly connected to the first rotating shaft, and the other end of the torsion spring is fixedly connected to the inner wall of the mounting box. The torsion spring always has the torque to twist the gripper into the clamping groove.

[0015] Preferably, the reinforcing cage is composed of multiple sets of transverse and longitudinal reinforcing bars, with the clamps holding the longitudinal reinforcing bars and the upper surface of the clamps being in close contact with the transverse reinforcing bars.

[0016] A construction method for a diaphragm wall device, using the aforementioned diaphragm wall device suitable for complex geological conditions, characterized in that... S1. First, clamp the steel cage with the locking assembly and grippers, so that the guide box and the installation box are located on both sides of the steel cage; S2. Then, using a crane connected to the lifting lugs on the top of the guide box, the steel cage and the diaphragm wall device are lifted by the crane. S3. Next, adjust the extension length of the pulley by adjusting the adjustment component so that the pulley fits against the side wall of the trench, thereby positioning the steel cage in the middle of the trench. S4. Then, gradually lower the hoisting rope to move the steel cage and the diaphragm together downwards. S5. Finally, when the ground wall ties reach the bottom of the trench, the locking component will release the gripper, and the gripper will retract into the groove. At this time, the ground wall ties can be lifted upwards by the crane.

[0017] Compared with related technologies, the diaphragm wall device and construction method suitable for complex geological conditions provided by the present invention have the following beneficial effects: 1. Effectively protects the mud cake on the trench walls, ensuring trench wall stability and wall quality: By using a pulley system with adjustable extension length installed on the outside of the guide box, the device ensures continuous rolling contact between the reinforcing cage and the trench sidewall during lowering. Compared to the traditional method where the reinforcing cage directly scrapes against the trench wall, this rolling friction method minimizes damage to the critical protective layer on the trench wall surface—the "mud skin." Maintaining the integrity of the mud skin significantly reduces the risk of localized soil instability, spalling, and even trench wall collapse caused by mud skin damage. Simultaneously, the smooth trench wall provides favorable conditions for subsequent concrete pouring, effectively avoiding defects such as mud inclusions and voids caused by irregular trench walls, fundamentally improving the forming quality, structural strength, and waterproofing reliability of the diaphragm wall.

[0018] 2. Achieve precise centering and positioning of the reinforcing cage to ensure uniform protective layer thickness: The core adjustment components of the device (composed of worm gears, worm shafts, threaded sleeves, and spline structures) allow construction personnel to precisely and synchronously adjust the extension of all pulleys on the guide boxes according to the actual width of the trench. This adjustment process is smooth and lockable, forcing the rebar cage system to be precisely aligned within the trench cross-section. This ensures that after the rebar cage is lowered to the design elevation, the thickness of the concrete cover around it is uniform, completely solving the problem of localized exposed rebar or insufficient cover caused by cage tilting in traditional methods, and greatly enhancing the durability and long-term safety of the diaphragm wall structure.

[0019] 3. Automated locking and releasing significantly improves construction safety and reliability: This invention features a unique gravity-triggered, phased automatic locking and releasing mechanism, revolutionizing traditional manual binding or disassembly operations. During the lowering process, the locking components (such as the C-shaped locking block, spring, and push plate) automatically and reliably lock the grippers under a preset mechanical relationship (balance between spring force and system gravity), ensuring a secure clamping. When the rebar cage reaches the bottom of the trench, the system's gravity changes, and the locking mechanism automatically and sequentially releases the locks, with the grippers quickly retracting under the action of the torsion spring. This fully automated process completely eliminates the need for personnel to perform high-risk operations near the trench opening and fundamentally eliminates serious engineering accidents such as "cage falling," "cage getting stuck," or even "cage burying" caused by human error or loose connections, resulting in a qualitative leap in construction safety.

[0020] 4. Simplify construction processes and improve work efficiency: This device integrates the "clamping-lowering-alignment-unhooking" operation of the rebar cage. During construction, all key steps can be completed in a single hoisting operation, eliminating the need for repeated adjustments, binding, or disassembly of tools at the trench opening. The automatic unhooking function allows the device to be lifted away immediately after the rebar cage is in place, significantly reducing the time spent on critical equipment such as cranes and accelerating the construction pace of individual trench sections. The simplified process reduces reliance on worker skill levels, promoting standardized and efficient construction organization and significantly improving overall work efficiency. Attached Figure Description

[0021] Figure 1 A structural schematic diagram of the diaphragm wall device and construction method suitable for complex geological conditions provided by the present invention; Figure 2 for Figure 1 The diagram shows the structural schematic of the steel cage. Figure 3 for Figure 2 The diagram shows the structure of the guide box. Figure 4 for Figure 3 One of the schematic diagrams of the cross-sectional structure of the guide box shown; Figure 5 for Figure 4 The second schematic diagram of the cross-sectional structure of the guide box shown; Figure 6 for Figure 5 The diagram shows the internal structure of the guide box. Figure 7 for Figure 3 One of the schematic cross-sectional views of the mounting box shown; Figure 8 for Figure 3 The second schematic diagram of the cross-sectional structure of the installation box shown; Figure 9 for Figure 8 The diagram shows the structure of the C-shaped locking block; Figure 10 for Figure 3 The diagram shows the structure after the grippers are inserted into the clamping groove.

[0022] Labels in the diagram: 1. Rebar cage; 2. Guide box; 3. Lifting lug; 4. Pulley; 5. Mounting box; 6. Clamping groove; 7. First rotating shaft; 8. Clamping claw; 9. Adjusting rod; 10. Adjusting groove; 11. Spline groove; 12. Spline tooth; 13. Second rotating shaft; 14. Worm gear; 15. Worm wheel; 16. Threaded sleeve; 17. Third rotating shaft; 18. Driving cone wheel; 19. Driven cone wheel; 20. Knob; 21. C-shaped locking block; 22. L-shaped connecting rod; 23. T-shaped slide; 24. Push plate; 25. Guide rod; 26. Spring; 27. Connecting plate; 28. Torsion spring; 29. ​​Transverse reinforcement; 30. Longitudinal reinforcement. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the invention and are not intended to limit the invention.

[0024] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0025] like Figures 1 to 10As shown, a diaphragm wall device suitable for complex geological conditions is disclosed. The diaphragm wall device includes: a reinforcing cage 1, characterized in that guide boxes 2 are respectively provided on both sides of the top and bottom of the reinforcing cage 1; among the four guide boxes 2, the tops of the two upper guide boxes 2 are symmetrically fixedly connected with lifting lugs 3; three pulleys 4 are equidistantly arranged on the side of the guide box 2 away from the reinforcing cage 1, and an adjustment component is installed inside the guide box 2 to adjust the extension length of the pulleys 4 so that the pulleys 4 fit against the inner wall of the trench; an installation box 5 is fixedly connected to the bottom of each guide box 2, and two clamping slots 6 are equidistantly opened on the side of the installation box 5 near the reinforcing cage 1, and a first rotating shaft 7 is symmetrically rotatably connected inside each clamping slot 6, and a clamping claw 8 is fixedly connected to the middle of the first rotating shaft 7 for clamping the reinforcing cage 1; a locking component is installed inside the installation box 5 for controlling the clamping and releasing of the clamping claw 8.

[0026] This section forms the basic framework of the device. Its core function is to provide guidance, centering, and automatic unhooking capability for the rebar cage 1 during hoisting and lowering. The device has four guide boxes 2 symmetrically arranged on both sides of the top and bottom of the rebar cage 1. The lifting lugs 3 on the top of the two upper guide boxes 2 provide lifting points for the crane. Multiple pulleys 4 on the outer side of each guide box 2 are the direct contact parts between the device and the trench sidewall. Their extension length can be precisely controlled by the built-in adjustment components to adapt to trenches of different widths, ensuring that the pulleys 4 are tightly against the trench wall, allowing the entire rebar cage 1 system to be lowered in a centered position within the trench, avoiding scraping. A mounting box 5 is fixedly connected to the bottom of each guide box 2. Within the clamping groove 6 on the side closest to the rebar cage 1, the gripper 8, which rotates via the first rotating shaft 7, is the actuator for the device to grip the rebar cage 1. The locking component inside the mounting box 5 is responsible for controlling the locking and unlocking of the gripper 8, which is crucial for the device to automatically detach after the rebar cage 1 is lowered into position.

[0027] like Figures 3 to 6As shown, the adjustment assembly includes: an adjustment rod 9; three adjustment slots 10 are equidistantly provided on the side of the guide box 2 away from the reinforcing cage 1, and the adjustment rod 9 is installed inside the adjustment slots 10; a spline groove 11 is provided on the outer wall of the adjustment rod 9, and a spline tooth 12 is fixedly connected to the inner wall of the adjustment slot 10, with the spline tooth 12 slidingly engaging with the spline groove 11; the end of the adjustment rod 9 away from the reinforcing cage 1 is rotatably connected to the pulley 4; a second rotating shaft 13 is rotatably connected inside the top of the guide box 2, and three worm gears 14 are uniformly fixedly connected to the outer wall of the second rotating shaft 13 along the axial direction; three worm wheels 15 are fixedly fixedly connected to the inside of the guide box 2 at equal intervals, with the worm wheels 15 meshing with the worm gears 14; a threaded sleeve 16 is fixedly connected to the inner wall of the worm wheel 15; the outer wall of the adjustment rod 9 is threaded, and the adjustment rod 9 is threadedly connected to the threaded sleeve 16. The top of the guide box 2 is rotatably connected to a third rotating shaft 17, the bottom of the third rotating shaft 17 is fixedly connected to a driving cone wheel 18, the outer wall of the second rotating shaft 13 is fixedly connected to a driven cone wheel 19, and the driving cone wheel 18 and the driven cone wheel 19 mesh; the top of the third rotating shaft 17 extends out of the guide box 2 and is fixedly connected to a knob 20.

[0028] This section details the mechanical transmission principle of adjusting the extension length of pulley 4. During operation, the knob 20 exposed on the top of the guide box 2 is rotated. Rotation of the knob 20 directly drives the third rotating shaft 17, which is fixed to it, to rotate, thereby driving the driving bevel gear fixed to its bottom end to rotate. The driving bevel gear meshes with the driven bevel gear fixed on the second rotating shaft 13, transmitting the rotational motion to the second rotating shaft 13. The worm gears 14 distributed axially on the second rotating shaft 13 rotate accordingly. Each worm gear 14 drives a meshing worm wheel 15 to rotate. Since the inner ring of the worm wheel 15 is fixedly connected to the threaded sleeve 16, the threaded sleeve 16 also rotates accordingly. One end of the adjusting rod 9 is threaded into the threaded sleeve 16, and the other end is connected to the pulley 4. A spline groove 11 is formed on its body, which slides with the spline teeth 12 fixed to the inner wall of the adjusting groove 10 of the guide box 2. This spline structure allows the adjusting rod 9 to slide axially but restricts its own rotation. Therefore, when the threaded sleeve 16 rotates, it forces the adjusting rod 9 to move linearly along its axis, thereby pushing or pulling the pulley 4 back, achieving stepless adjustment of the extension length. The worm gear 15 and worm 14 mechanism has self-locking properties, which can lock the position after adjustment to prevent the pulley 4 from retracting when under force.

[0029] like Figure 3 , Figures 7 to 10As shown, the locking assembly includes: an inverted locking block 21, symmetrically arranged inside the mounting box 5, which engages with the gripper 8 to lock the gripper 8 in its clamping state; an L-shaped connecting rod 22 is fixedly connected to the middle of the inverted locking block 21 on the side away from the gripper 8; T-shaped grooves 23 are symmetrically provided inside the mounting box 5, and the inverted locking block 21 and the L-shaped connecting rod 22 slide within the T-shaped grooves 23; a push plate 24 is fixedly connected to the bottom of the L-shaped connecting rod 22; three guide rods 25 are fixedly connected to the top of the push plate 24, the top ends of the guide rods 25 are slidably connected to the mounting box 5, and springs 26 are fixedly connected to the top ends of the guide rods 25; the top ends of the springs 26 are fixedly connected to the inner wall of the mounting box 5; the springs 26 are compression springs, and the elastic force of the springs 26 is greater than the weight of the push plate 24 and less than the sum of the weights of the guide box 2 and the mounting box 5. Of the four push plates 24, the bottoms of the two upper push plates 24 are symmetrically fixedly connected to connecting plates 27, and the bottom ends of the connecting plates 27 are fixedly connected to the guide box 2 located below. A torsion spring 28 is provided on the outer wall of the bottom end of the first rotating shaft 7. One end of the torsion spring 28 is fixedly connected to the first rotating shaft 7, and the other end of the torsion spring 28 is fixedly connected to the inner wall of the mounting box 5; the torsion spring 28 always has the torque to twist the gripper 8 into the clamping groove 6. The reinforcing cage 1 consists of multiple sets of transverse reinforcing bars 29 and longitudinal reinforcing bars 30. The gripper 8 clamps the longitudinal reinforcing bars 30, and the upper surface of the gripper 8 is in close contact with the transverse reinforcing bars 29.

[0030] This part is the core mechanism for realizing the automatic grabbing and release of the steel cage 1 by the device. Its working process is divided into two main states: "locking" and phased "release".

[0031] Locked state: When the device is lifted and suspended by the crane via the lifting lug 3, the entire guide box 2 and mounting box 5 system naturally tend to move downwards under the influence of gravity. At this time, the spring 26 inside the mounting box 5 is in a compressed state, and its upward elastic force acts on the push plate 24 through the guide rod 25. This elastic force is greater than the weight of the push plate 24 itself, but less than the weight of the entire guide box 2 and mounting box 5 system. Therefore, in the suspended state, the elastic force of the spring 26 can push the push plate 24, the L-shaped connecting rod 22 fixed thereto, and the C-shaped locking block 21 to slide downwards along the T-shaped slide groove 23 to the lowest position.

[0032] After the reinforcing cage 1 is positioned so that the gripper 8 hooks onto its longitudinal reinforcing bars 30, the downward-sliding C-shaped locking block 21 precisely engages with a specific part of the gripper 8 in its closed state. This engagement firmly locks the gripper 8, preventing it from rotating around the first pivot 7 to open, thus ensuring that the gripper 8 stably holds the reinforcing cage 1 during hoisting and lowering. Simultaneously, the upper surface of the gripper 8 is in close contact with the transverse reinforcing bars 29 of the reinforcing cage 1, further enhancing the stability of the gripping. The two upper guide boxes 2 are rigidly connected to the corresponding lower push plates 24 via their bottom connecting plates 27, ensuring that the two pairs of guide boxes 2 and grippers 8 can be linked and locked synchronously.

[0033] Released state: When the reinforcing cage 1 is lowered to the point where it is about to contact the bottom of the trench, the release process is divided into two stages: Phase 1: Lower gripper 8 unlocks. The rebar cage 1 first contacts the bottom of the trench. The crane continues to slowly lower the hoisting rope. At this time, the entire weight of the rebar cage 1 and its connected upper and lower guide systems is transferred to the bottom of the trench through the push plate 24 located at the bottom. This total downward pressure exceeds the preset elastic force of the spring 26 inside the lower mounting box 5. Therefore, the lower guide box 2 and mounting box 5 will continue to move downward a short distance relative to their internal locking mechanism under the action of gravity. This relative movement causes the lower C-shaped locking block 21 and L-shaped connecting rod 22 to slide upward relative to their mounting box 5. When the mounting box 5 descends to a certain position, the C-shaped locking block 21 disengages from the lower gripper 8. After being unlocked, the lower gripper 8 quickly rotates inward under the action of the torsion spring 28 and retracts into the clamping groove 6. At this point, the lower guide box 2 and mounting box 5 system are disconnected from the rebar cage 1.

[0034] Phase Two: Upper Clamp 8 Unlocks. The crane continues to lower the hoisting rope. At this point, the lower guide box 2 system is already supported on the ground and cannot descend further, while the rebar cage 1 has also reached the ground. The connecting plate 27 transmits the support status of the lower system to the upper push plate 24, causing it to be "held in place" and unable to descend with the upper box. As the hoisting rope continues to loosen, the upper guide box 2 and mounting box 5 systems move downwards independently under their own weight, while the push plate 24 and locking mechanism inside remain relatively stationary due to being held in place by the connecting plate 27. This also causes the upper C-shaped locking block 21 to slide upwards relative to its mounting box 5. As the upper mounting box 5 moves downwards, the C-shaped locking block 21 eventually disengages from the upper clamp 8. Subsequently, the upper clamp 8 also retracts under the action of the torsion spring 28. At this point, the entire diaphragm wall device is completely detached from the rebar cage 1.

[0035] After the above two stages of release are completed, the lifting rope can lift the entire device out of the trench, while the steel cage 1 is accurately and stably placed at the designed position at the bottom of the trench.

[0036] A construction method for a diaphragm wall device, using the aforementioned diaphragm wall device suitable for complex geological conditions, characterized in that... S1. First, clamp the steel cage 1 with the locking assembly and the clamp 8, so that the guide box 2 and the mounting box 5 are located on both sides of the steel cage 1. S2. Then, using a crane connected to the lifting lug 3 on the top of the guide box 2, the steel cage 1 and the ground diaphragm device are lifted by the crane. S3. Next, adjust the extension length of pulley 4 by adjusting the component so that pulley 4 fits against the side wall of the trench, thereby positioning the steel cage 1 in the middle of the trench. S4. Then, gradually lower the hoisting rope to move the steel cage 1 and the diaphragm together downwards. S5. Finally, when the ground wall ties reach the bottom of the trench, the locking component will release the locking of the gripper 8, and the gripper 8 will retract into the clamping groove 6. At this time, the ground wall ties can be lifted upward by the crane.

[0037] The working principle of this invention is as follows: 1. Overall collaborative relationships: The device uses four guide boxes 2 symmetrically arranged on both sides of the reinforcing cage 1 as the main frame. The lifting lugs 3 of the upper guide box 2 serve as the lifting points, and the pulleys 4 on its outer side form the guiding contact surface with the trench wall. The mounting box 5 at the bottom of the guide box 2 is equipped with a clamping and locking mechanism to realize the connection and disconnection with the reinforcing cage 1. The adjustment mechanism, locking mechanism and reset mechanism inside each box work together through mechanical linkage.

[0038] 2. Adjustment and centering guidance mechanism for pulley 4 extension: Before construction, the positions of each pulley 4 need to be adjusted according to the actual width of the trench to ensure the centering of the reinforcing cage 1. The operator rotates the knob 20 on the top of any guide box 2, and the power is transmitted through the third rotating shaft 17 to the meshing driving bevel gear and driven bevel gear, driving the second rotating shaft 13 to rotate. The worm gear 14 set on this shaft drives the corresponding worm wheel 15 to rotate, so that the threaded sleeve 16 fixed to the worm wheel 15 rotates synchronously. The adjusting rod 9, which is threaded with the sleeve, cannot rotate due to the constraint of the spline groove 11 on the outer wall and the spline teeth 12 on the inner wall of the guide box 2, and is forced to produce axial linear motion, thereby pushing or pulling back the pulley 4 hinged to its end. The self-locking characteristic of the worm wheel 15 and worm gear 14 transmission can ensure that the adjusted extension length remains stable under working load. By synchronously adjusting the multiple sets of pulleys 4 on all guide boxes 2 so that their ends are evenly attached to the two side walls of the trench, precise centering guidance can be provided throughout the lowering of the reinforcing cage 1, effectively preventing scratches.

[0039] 3. Automatic clamping and locking with phased release mechanism: This mechanism is the core of the automation achieved by this invention, and its working process is based on the balance change between gravity and the force of spring 26: Initial clamping and locking state: When the device is lifted off the ground and suspended by the lifting lug 3, the compression spring 26 inside the mounting box 5 pushes the guide rod 25 and the push plate 24 fixed thereto upwards. Since the preset elastic force of the spring 26 is greater than the weight of the push plate 24, this elastic force pushes the push plate 24, the L-shaped connecting rod 22, and the C-shaped locking block 21 down along the T-shaped slide 23 to the lowest position. At this time, each gripper 8 is hooked onto the longitudinal main bar of the reinforcing cage 1, and the C-shaped locking block 21, which has moved down to the position, engages with the locking part of the gripper 8, locking the gripper 8 in the closed state. The upper surface of the gripper 8 is also in close contact with the transverse reinforcing bar 29 of the reinforcing cage 1, achieving multi-point stable clamping. The upper and lower guide boxes 2 are linked by the connecting plate 27 to ensure that all grippers 8 are locked synchronously.

[0040] Automatic phased release after reaching the bottom of the tank: Phase 1: Release of the lower gripper 8. When the reinforcing cage 1 is lowered to the bottom of the contact trench, its weight and the weight of the upper device are all transferred to the lowermost mounting box 5 and push plate 24. The lifting rope continues to descend slightly; this total downward force exceeds the preload of the spring 26 inside the lower mounting box 5, causing the guide box 2 and mounting box 5 to move downwards relative to the locking mechanism inside, which is already limited by the bottom of the trench. This relative movement causes the lower C-shaped locking block 21 and L-shaped connecting rod 22 to slide upwards relative to their mounting box 5, thereby releasing the locking of the lower gripper 8.

[0041] Phase Two: Upper Gripper 8 Releases. After the lower gripper 8 unlocks, its guide box 2 system falls to the bottom of the trench. The hoisting rope continues to descend, and the steel cage 1 and the upper device still tend to move downwards under gravity. At this point, the lower guide box 2, which has already landed, provides upward support to the upper push plate 24 through the connecting plate 27, preventing it from moving. Meanwhile, the upper guide box 2 and the mounting box 5 continue to descend, creating a relative movement where the upper C-shaped locking block 21 slides upwards relative to its mounting box 5, ultimately releasing the gripper 8.

[0042] 4. Automatic reset mechanism for gripper 8: A torsion spring 28 is installed on the first rotating shaft 7 of each gripper 8. When the gripper 8 is locked in the clamping position by the U-shaped locking block 21, the torsion spring 28 is in a torsional energy storage state. Once the locking block is released (as described in the release stage), the elastic potential energy stored in the torsion spring 28 is immediately released, driving the first rotating shaft 7 to rotate, thereby causing the gripper 8 to quickly and automatically rotate back into the clamping groove 6 of the mounting box 5. This reset action ensures that the gripper 8 will not be exposed and hooked after the device is detached from the rebar cage 1, ensuring the safety and smoothness of the subsequent lifting process.

[0043] 5. Integrated application of construction process: Based on the above working principle, during construction: first, the device is clamped and locked to the reinforcing cage 1; before being hoisted into the trench, the pulley 4 is pre-adjusted to make contact with the trench wall; during the lowering process, the pulley 4 rolls to guide and keep the cage centered; after the cage touches the bottom, the locking mechanism automatically unlocks in sequence, and the gripper 8 automatically resets and retracts; finally, the unloaded device is hoisted out, completing the precise implantation of the reinforcing cage 1. The entire process achieves integrated operation of guiding, centering, stable lowering, and automatic unhooking.

[0044] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A diaphragm wall device suitable for complex geological conditions, comprising: A reinforcing cage (1) is characterized in that guide boxes (2) are respectively provided on both sides of the top and bottom of the reinforcing cage (1); among the four guide boxes (2), the top of the two guide boxes (2) located at the top are symmetrically fixedly connected with lifting lugs (3); three pulleys (4) are equidistantly provided on the side of the guide box (2) away from the reinforcing cage (1), and an adjustment component is installed inside the guide box (2), which is used to adjust the extension length of the pulleys (4) so ​​that the pulleys (4) fit against the inner wall of the trench; an installation box (5) is fixedly connected to the bottom of the guide box (2), and two clamping slots (6) are equidistantly opened on the side of the installation box (5) close to the reinforcing cage (1), and a first rotating shaft (7) is symmetrically rotatably connected inside each clamping slot (6), and a clamping claw (8) is fixedly connected to the middle of the first rotating shaft (7), which is used to clamp the reinforcing cage (1); a locking component is installed inside the installation box (5), which is used to control the clamping and releasing of the clamping claw (8).

2. The diaphragm wall device suitable for complex geological conditions according to claim 1, characterized in that, The adjustment assembly includes: an adjustment rod (9); three adjustment slots (10) are equidistantly provided on the side of the guide box (2) away from the steel cage (1); the adjustment rod (9) is provided inside the adjustment slots (10); a spline groove (11) is provided on the outer wall of the adjustment rod (9); a spline tooth (12) is fixedly connected to the inner wall of the adjustment slot (10); the spline tooth (12) and the spline groove (11) slide in fit; the end of the adjustment rod (9) away from the steel cage (1) is rotatably connected to the pulley (4); a second rotating shaft (13) is rotatably connected inside the top of the guide box (2); three worm gears (14) are uniformly fixedly connected along the axial direction on the outer wall of the second rotating shaft (13); three worm wheels (15) are fixedly connected at equal intervals inside the guide box (2); the worm wheels (15) mesh with the worm gears (14); a threaded sleeve (16) is fixedly connected to the inner wall of the worm wheel (15); the outer wall of the adjustment rod (9) is threaded; and the adjustment rod (9) is threadedly connected to the threaded sleeve (16).

3. The diaphragm wall device suitable for complex geological conditions according to claim 2, characterized in that, The top of the guide box (2) is rotatably connected to a third rotating shaft (17), the bottom of the third rotating shaft (17) is fixedly connected to a driving cone wheel (18), the outer wall of the second rotating shaft (13) is fixedly connected to a driven cone wheel (19), the driving cone wheel (18) and the driven cone wheel (19) mesh; the top of the third rotating shaft (17) extends out of the guide box (2) and is fixedly connected to a knob (20).

4. The diaphragm wall device and construction method suitable for complex geological conditions according to claim 1, characterized in that, The locking assembly includes: an inverted locking block (21), which is symmetrically arranged inside the mounting box (5). The inverted locking block (21) is used to engage with the gripper (8) to lock the gripper (8) in a clamping state. An L-shaped connecting rod (22) is fixedly connected to the middle of the side of the inverted locking block (21) away from the gripper (8). A T-shaped slide groove (23) is symmetrically opened inside the mounting box (5). The inverted locking block (21) and the L-shaped connecting rod (22) slide in the T-shaped slide groove (23). A push plate (24) is fixedly connected to the bottom of the L-shaped connecting rod (22).

5. The diaphragm wall device suitable for complex geological conditions according to claim 4, characterized in that, Three guide rods (25) are fixedly connected to the top of the push plate (24). The top of the guide rods (25) is slidably connected to the mounting box (5). A spring (26) is fixedly connected to the top of the guide rods (25). The top of the spring (26) is fixedly connected to the inner wall of the mounting box (5). The spring (26) is a compression spring. The elastic force of the spring (26) is greater than the weight of the push plate (24) and less than the sum of the weights of the guide box (2) and the mounting box (5).

6. The diaphragm wall device suitable for complex geological conditions according to claim 5, characterized in that, Of the four push plates (24), the bottom of the two upper push plates (24) are symmetrically fixedly connected with connecting plates (27), and the bottom end of the connecting plates (27) is fixedly connected to the guide box (2) located below.

7. The diaphragm wall device suitable for complex geological conditions according to claim 4, characterized in that, The outer wall of the bottom end of the first rotating shaft (7) is provided with a torsion spring (28). One end of the torsion spring (28) is fixedly connected to the first rotating shaft (7), and the other end of the torsion spring (28) is fixedly connected to the inner wall of the mounting box (5). The torsion spring (28) always has the torque to twist the gripper (8) into the clamping groove (6).

8. The diaphragm wall device suitable for complex geological conditions according to claim 4, characterized in that, The steel cage (1) is composed of multiple sets of transverse steel bars (29) and longitudinal steel bars (30). The clamps (8) hold the longitudinal steel bars (30), and the upper surface of the clamps (8) is in close contact with the transverse steel bars (29).

9. A construction method for a diaphragm wall device, using a diaphragm wall device as described in claim 1 suitable for complex geological conditions, characterized in that, S1. First, clamp the steel cage (1) with the locking assembly and the clamp (8) so that the guide box (2) and the installation box (5) are located on both sides of the steel cage (1); S2. Then, using a crane connected to the lifting lug (3) on the top of the guide box (2), the steel cage (1) and the ground diaphragm device are lifted by the crane. S3. Next, adjust the extension length of the pulley (4) by adjusting the component so that the pulley (4) fits against the side wall of the trench, thereby placing the steel cage (1) in the middle of the trench. S4. Then, gradually lower the hoisting rope so that the steel cage (1) and the diaphragm wall device move downward together; S5. Finally, when the ground wall ties reach the bottom of the trench, the locking component will release the locking of the claw (8), and the claw (8) will be retracted into the clamping groove (6). At this time, the ground wall ties can be lifted upward by the crane.

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